2220121 has 4 divisors (see below), whose sum is σ = 2316672. Its totient is φ = 2123572.

The previous prime is 2220089. The next prime is 2220151. The reversal of 2220121 is 1210222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2220121 - 2⁵ = 2220089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220098 and 2220107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48241 + ... + 48286.

It is an arithmetic number, because the mean of its divisors is an integer number (579168).

2^2220121 is an apocalyptic number.

It is an amenable number.

2220121 is a deficient number, since it is larger than the sum of its proper divisors (96551).

2220121 is an equidigital number, since it uses as much as digits as its factorization.

2220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96550.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2220121 is about 1490.0070469632. The cubic root of 2220121 is about 130.4544450342.

Adding to 2220121 its reverse (1210222), we get a palindrome (3430343).

It can be divided in two parts, 22201 and 21, that added together give a palindrome (22222).

The spelling of 2220121 in words is "two million, two hundred twenty thousand, one hundred twenty-one".